We demonstrate a sub-GHz RF-photonic filter based on phase and amplitude control of a wideband all-fiber frequency parametric comb with 25-GHz tone spacing. The narrow bandwidth filter construction based on 221 comb tones was enabled by fourth-order dispersion compensation of the dispersive element. The filter integrity was further tested by retrieval of a set of digital modulated RF channels.

中文翻译：

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通过四阶色散补偿实现的 Sub-GHz 平顶射频光子滤波器的演示

我们展示了一种基于具有 25 GHz 音调间隔的宽带全光纤频率参数梳的相位和幅度控制的 sub-GHz 射频光子滤波器。通过色散元件的四阶色散补偿实现了基于 221 个梳状音调的窄带宽滤波器结构。通过检索一组数字调制射频通道进一步测试了滤波器的完整性。